Iron Mountain vs Nocturnal Gray
Both from Benjamin Moore's palette. Hue-wise, Iron Mountain belongs to the grey family and Nocturnal Gray to the blue-grey family. Nocturnal Gray (LRV 14) reflects noticeably more light than Iron Mountain (LRV 11), a difference of 3 points that becomes especially apparent in rooms with limited natural light. Iron Mountain runs red while Nocturnal Gray is decidedly blue, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 10.1, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Iron Mountain vs Nocturnal Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Iron Mountain on one side and Nocturnal Gray on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Iron Mountain comparisons
See how Iron Mountain stacks up against other well-photographed colors across different brands and tones.
